/*
 * Copyright 2010 Yannick Stucki (yannickstucki.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.yannickstucki.android.musicqueue.songpicking;

import java.util.ArrayList;
import java.util.Random;

import com.yannickstucki.android.musicqueue.data.Song;

/**
 * A song picker that picks songs randomly.
 * 
 * @author Yannick Stucki
 *
 */
public class RandomSongPicker implements ISongPicker {
  
  /**
   * This class picks songs randomly.
   */
  private Random random = new Random();

  /**
   * To have access to all the songs that can be picked.
   */
  private ArrayList<Song> allSongs;
  
  /**
   * Constructor sets the random seed.
   */
  public RandomSongPicker() {
    random.setSeed(System.currentTimeMillis());
  }
  
  @Override
  public Song nextSong() {
    return allSongs.get(random.nextInt(allSongs.size()));
  }

  /**
   * Sets the song list reference>.
   */
  public void setAllSongs(ArrayList<Song> allSongs) {
    this.allSongs = allSongs;
  }
}
